The vehicle information communication system (VICS) communicates with the navigation radio over 3 circuits. These are the traffic information signal (+) circuit, the traffic information signal (-) circuit and the traffic information request signal.

There is no response from the VICS module when queried by the navigation radio after successfully initializing the system.

The navigation radio does not receive information from the VICS module when the radio detects a power mode transition to ON.

The VICS switch disappears from the navigation system menu.

The navigation radio receives a response from the VICS module.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

Entertainment/Communication Connector End Views

Electrical Information Reference

1. Disconnect the VICS harness connector. Verify that a test lamp illuminates between the B+ circuit terminal 3 and ground.

⇒	If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

2. Test for less than 1 ohm of resistance between the ground circuit terminal 5 and ground.

⇒	If greater than 1 ohm, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 4 and ground.

⇒	If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

4. Disconnect the radio harness connector. Verify that all circuits between the VICS and the radio are not open, shorted to ground or shorted to power.

⇒	If a circuit fault is found, repair the suspect circuit.

⇒	If all circuits test normal, replace the VICS.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Refer to the VICS dealer installation instructions.